People spend 90% of their lives indoors and only 10% outdoors. To ensure a proper ambient heating, ventilation air conditioning systems are installed. In particular, is very important in order to provide enough fresh air, but also extract pollutants, hence good indoor life quality. Reliable evaluation velocity ducts one the most challenging measurements be carried out commissioning operating sy...

Concerning the previous anatomical knowledge and requirements of current hepato-pancreato-biliary practice it was our aim to enhance the anatomy knowledge of the caudate lobe biliary drainage. Using the injection-corrosion method we made 27 acrylic porto-biliary casts of proper quality from 30 post-mortem, adult human liver specimens. During the observation under a magnifying glass a portal vas...

of the lungs, including alveoli, is usually divided into two portions, i.e., the airway and the respiratory portion. Although the latter is morphologically subdivided into the respiratory bronchioli, alveolar ducts, alveolar sacs and alveoli, it will be much more useful to divide the respiratory portion into two parts, i.e., the central ducts succeeding the airway and alveoli surrounding the ce...

Distal airways are less than 2 mm in diameter, comprising a relatively large cross-sectional area that allows for slower, laminar airflow. The airways include both membranous bronchioles and gas exchange ducts, and have been referred to in the past as the 'quiet zone', in part because these structures were felt to contribute little to lung mechanics and in part because they were difficult to st...